Overloading is simply the 2 or more than two functions with 
different signatures.

Overriding is related with Polymorphism, where virtual 
function declared in base class is override in the derived 
class with the same name. And compiler during runtime 
decide which function to be called based on the object 
(Base Class or Derived Class) used to call this function.

Overloading is a concept in OOPS where we have a similar 
methods of same name but diferent signature.The return type 
may be same or different but the signature has to be 
different.It is an example of static polymorphism.

Overriding is a conecpt where we have the same method 
(signature and return type) both is child class and parent 
class. Now why we have the same method ? You will have that 
thing happen when you want to add more funtionalities to a 
method corresponding to your child class. This is an 
example of runtime polymorphism